渦街流量計的穩壓補償
信息來源: 華恒 | [ 2019-04-30 ] 點擊量: 319

   渦街流量計的穩壓補償規則,西安華恒儀表介紹:渦街流量計測量高溫氣體是為什么需要穩壓補償,因為氣體的體積溫度和壓力影響比較大,所以在測量高溫氣體是管道內部會有壓力,這樣氣體的體積因為溫度膨脹,但是由于壓力不斷增大,會導致氣體的體積又會壓縮,所以在沒有補償的情況,我們用渦街流量計所測得流量和實際是有很大誤差的

 
  The regulation of voltage stabilization compensation for vortex flowmeter is introduced by Xi'an Huaheng Instrument:Why need voltage stabilization compensation for measuring high temperature gas by vortex flowmeter?Because the influence of volume temperature and pressure of gas is relatively large,there will be pressure inside the pipeline when measuring high temperature gas.The volume of gas will expand because of temperature,but the volume of gas will be increased because of pressure.Compression,therefore,in the absence of compensation,the flow rate measured by the vortex flowmeter is quite different from the actual flow rate.
 
  按照測量原理來說,我們的流量計實際上只能測量當前工況下流體流過的體積,所以這個情況對我們不實用。
 
  According to the principle of measurement,our flowmeter can only measure the volume of fluid flowing through the current working condition,so this situation is not practical for us.
 
  我們實際上使用的時候,是想測量流過多少質量的流體。而蒸汽在不同的壓力和溫度下,密度變化很大,所以就要在測量蒸汽流過多少體積的同時要測量壓力和溫度。只有時刻了解蒸汽的密度才可以,準確測量出蒸汽的質量。
 
  When we actually use it,we want to measure how much mass of fluid is flowing.The density of steam varies greatly under different pressures and temperatures,so it is necessary to measure both pressure and temperature while measuring the volume of steam flow.Only when the density of steam is known at all times can the quality of steam be measured accurately.
 
  所謂補償,就是根據流體的溫度和壓力數據來計算出流體的密度,從而根據測量出來的流體體積,計算出流體質量。
 
  The so-called compensation is to calculate the density of the fluid according to the temperature and pressure data of the fluid,so as to calculate the mass of the fluid according to the measured volume of the fluid.
 
  至于水蒸汽的補償,如果水蒸汽是飽和蒸汽就要進行壓力或者溫度補償(溫度補償和壓力補償各選其一)。如果是過熱蒸汽則要進行溫壓補償(溫度補償和壓力補償同時進行)。
 
  As for the compensation of water vapor,if the water vapor is saturated vapor,pressure or temperature compensation(temperature compensation and pressure compensation each choose one).If it is superheated steam,temperature and pressure compensation(temperature compensation and pressure compensation at the same time).
 
  注意一點,在水蒸汽的分類中,飽和蒸汽和過熱蒸汽,千萬不能弄錯,因為飽和蒸汽的密度是高于過熱蒸汽的,在儀表的選擇和設置時一定要注意。一旦在這個地方搞錯,會造成嚴重的經濟損失。
 
  Note that in the classification of water vapor,saturated vapor and superheated vapor must not be mistaken,because the density of saturated vapor is higher than that of superheated vapor,and attention must be paid to the selection and installation of instruments.Once you make a mistake in this place,it will cause serious economic losses.
 
  當然也有一些儀表,不必區分水蒸汽是飽和蒸汽還是過熱蒸汽,因為它們除了接測量流量的裝置外,同時也接有測量溫度和壓力的裝置。
 
  Of course,there are also some instruments,which do not need to distinguish between saturated steam and superheated steam,because they are connected not only with flow measurement devices,but also with temperature and pressure measurement devices.
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